Download sentinel 2 with Sentinelhub

Forum|Forum|1 year ago
April 17, 2024
1 reply
0 views

SentinelHub User
Known Participant

hello! I am trying to download a mosaic corresponding to my area of interest (specifying the coordinates of my polygon). Everything is going fine until I try to visualize the data. I fail in this part. specifically on the second line (when I declare the viable tar). If you can help me find the error I would really appreciate it. Thank you.@batic @max.kampen .

response = oauth.post(f"{url}/api/v1/process", headers=headers, json = request)
tar = tarfile.open(fileobj=io.BytesIO(response.content))
userdata = json.load(tar.extractfile(tar.getmember(‘userdata.json’)))
userdata.

Before that, i made this:
from oauthlib.oauth2 import BackendApplicationClient
from requests_oauthlib import OAuth2Session

# Your client credentials
client_id = ‘xxxx’
client_secret = ‘xxxx’

# Create a session
client = BackendApplicationClient(client_id=client_id)
oauth = OAuth2Session(client=client)
oauth.fetch_token(token_url=‘https://services.sentinel-hub.com/oauth/token’,

                     client_id=client_id, client_secret=client_secret)*

url = ‘https://services.sentinel-hub.com’

evalscript = “”"
//VERSION=3
function setup() {

return {*
input: [“B02”, “dataMask”],*
mosaicking: Mosaicking.ORBIT,*
output: {*
```
 id: "default",*
```
```
 bands: 1*
```
}*
}*
}

function evaluatePixel(samples, scenes, inputMetadata, customData, outputMetadata) {

//Average value of band B02 based on the requested scenes*
var sumOfValidSamplesB02 = 0*
var numberOfValidSamples = 0*
for (i = 0; i < samples.length; i++) {*
var sample = samples[i]*
if (sample.dataMask == 1){*
```
   sumOfValidSamplesB02 += sample.B02*
```
```
   numberOfValidSamples += 1*
```
}*
}*
return [sumOfValidSamplesB02 / numberOfValidSamples]*
}

function updateOutputMetadata(scenes, inputMetadata, outputMetadata) {

outputMetadata.userData = {*
“inputMetadata”: inputMetadata*
}*
outputMetadata.userData[“orbits”] = scenes.orbits*
}
“”"

request = {

“input”: {*
```
   "bounds": {*
```
```
       "properties": {*
```

           "crs": "http://www.opengis.net/def/crs/OGC/1.3/CRS84"*

```
       },*
```
```
       "geometry": {*
```
“type”: “Polygon”,*
“coordinates”: [*
[*
```
 [*
```
```
   -7.19013464948524,*
```
```
   37.1950340145669*
```
```
 ],*
```
```
 [*
```
```
   -7.17017478002351,*
```
```
   37.1323029962586*
```
```
 ],*
```
```
 [*
```
```
   -7.44961295248773,*
```
```
   37.0866804374889*
```
```
 ],*
```
```
 [*
```
```
   -7.60644049825846,*
```
```
   37.5571630748011*
```
```
 ],*
```
```
 [*
```
```
   -7.30419104640941,*
```
```
   38.0048344327285*
```
```
 ],*
```
```
 [*
```
```
   -7.11884940140763,*
```
```
   38.0818225006523*
```
```
 ],*
```
```
 [*
```
```
   -7.37262488456391,*
```
```
   38.3783691326551*
```
```
 ],*
```
```
 [*
```
```
   -7.35266501510218,*
```
```
   38.6834699944273*
```
```
 ],*
```
```
 [*
```
```
   -7.05041556325313,*
```
```
   38.9914222661226*
```
```
 ],*
```
```
 [*
```
```
   -7.1644719601773,*
```
```
   39.0427476447384*
```
```
 ],*
```
```
 [*
```
```
   -7.32129950594803,*
```
```
   39.3278886370489*
```
```
 ],*
```
```
 [*
```
```
   -7.12740363117694,*
```
```
   39.441945033973*
```
```
 ],*
```
```
 [*
```
```
   -6.73961188163476,*
```
```
   39.467607723281*
```
```
 ],*
```
```
 [*
```
```
   -6.2349123252453,*
```
```
   39.2394949294326*
```
```
 ],*
```
```
 [*
```
```
   -5.21695898269707,*
```
```
   39.6244352690517*
```
```
 ],*
```
```
 [*
```
```
   -4.07069219360915,*
```
```
   39.6443951385134*
```
```
 ],*
```
```
 [*
```
```
   -3.902459008146,*
```
```
   39.5160816919737*
```
```
 ],*
```
```
 [*
```
```
   -2.87024861598225,*
```
```
   40.1947172536726*
```
```
 ],*
```
```
 [*
```
```
   -2.38265751913142,*
```
```
   40.1120263659025*
```
```
 ],*
```
```
 [*
```
```
   -2.12317921612893,*
```
```
   39.9038734415159*
```
```
 ],*
```
```
 [*
```
```
   -2.04904255812821,*
```
```
   39.3335914568951*
```
```
 ],*
```
```
 [*
```
```
   -2.63073018244149,*
```
```
   38.538048088349*
```
```
 ],*
```
```
 [*
```
```
   -3.29510869452479,*
```
```
   38.4097346418093*
```
```
 ],*
```
```
 [*
```
```
   -4.01366399514707,*
```
```
   38.4411001509634*
```
```
 ],*
```
```
 [*
```
```
   -4.45848394315133,*
```
```
   38.2215415868844*
```
```
 ],*
```
```
 [*
```
```
   -5.22836462238949,*
```
```
   38.1816218479609*
```
```
 ],*
```
```
 [*
```
```
   -6.03816504055111,*
```
```
   38.0561598113444*
```
```
 ],*
```
```
 [*
```
```
   -6.34326590232326,*
```
```
   38.0304971220364*
```
```
 ],*
```
```
 [*
```
```
   -6.59418997555644,*
```
```
   37.8537097068039*
```
```
 ],*
```
```
 [*
```
```
   -6.82800558925099,*
```
```
   37.7966815083419*
```
```
 ],*
```
```
 [*
```
```
   -7.19013464948524,*
```
```
   37.5172433358776*
```
```
 ],*
```
```
 [*
```
```
   -7.28993399679389,*
```
```
   37.3604157901069*
```
```
 ],*
```
```
 [*
```
```
   -7.19013464948524,*
```
```
   37.1950340145669*
```
```
 ]*
```
]*
]*
}
```
   },*
```
```
   "data": [*
```
```
       {*
```
```
           "type": "sentinel-2-l2a",*
```
```
           "dataFilter": {*
```
```
               "timeRange": {*
```

                   "from": "2018-10-01T00:00:00Z",*

                   "to": "2018-10-20T00:00:00Z"*

```
               }*
```
```
           }*
```
```
       }*
```
```
   ]*
```
},*
“output”: {*
```
   "width": 512,*
```
```
   "height": 512,*
```
```
   "responses": [*
```
```
       {*
```
```
           "identifier": "default",*
```
```
           "format": {*
```
```
               "type": "image/jpeg",*
```
```
               "quality": 80*
```
```
           }*
```
```
       }*
```
```
   ]*
```
}*
}

headers = {

‘Content-Type’: ‘application/json’,*
‘Accept’: ‘application/x-tar’*
}

Sinergise Team
Known Participant
Forum|Forum|1 year ago
April 17, 2024

Hi Elena

You were almost there.

You need to add an additional response, i.e the userdata response to the output. You can copy this code below

"output": {
   "width": 512,
   "height": 512,
   "responses": [
       {
           "identifier": "default",
           "format": {
               "type": "image/jpeg",
               "quality": 80
           }
       },
       {
        "identifier": "userdata",
        "format": {
          "type": "application/json"
        }
      }
   ]
},

Let us know if that solves the error

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